CN113196992A

CN113196992A - Greenhouse skeleton structure imitating gorgon fruit leaf vein dome

Info

Publication number: CN113196992A
Application number: CN202110564202.9A
Authority: CN
Inventors: 关姝杰
Original assignee: Shenyang University
Current assignee: Shenyang University
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-08-03

Abstract

The invention is applied to the field of greenhouse skeleton structure design, and particularly relates to a gordon euryale leaf vein dome-imitating greenhouse skeleton structure. Comprises a ring beam, a middle upright post, a main beam, a greenhouse door and a skylight, wherein the ring beam divides a circle into 20 equal parts, the invention provides a dome framework structure which is high in strength, strong in illumination, material-saving and convenient for mechanical operation by referring to a gorgon fruit leaf vein structure, and analysis proves that the branch structure and the branch angle of the gorgon fruit leaf vein can transfer the action of concentrated stress, improve the strength of the whole structure, and can save materials on the premise of ensuring the sufficient strength of a greenhouse.

Description

Greenhouse skeleton structure imitating gorgon fruit leaf vein dome

Technical Field

The invention is applied to the field of greenhouse skeleton structure design, and particularly relates to a gordon euryale leaf vein dome-imitating greenhouse skeleton structure.

Background

The steel bar structure does not have circular greenhouse of post arch, and daylighting performance is good, and the mechanized operation of being convenient for can reach the framework effect that space utilization maximize and surface area minimize, is the best mode of ecological agriculture three-dimensional farming, because the reduction of stand, the bearing capacity of greenhouse then is the first consideration of designing circular greenhouse.

At present, the main structure of the existing dome greenhouse is similar to a bird nest structure, and a main beam of the existing dome greenhouse is composed of regular triangle, regular hexagon or quadrilateral truss units. The bird's nest structure greenhouse with the main beams of regular triangles and regular hexagon truss units has higher strength, but the number of the cross beams is large, the illumination is influenced, the economical efficiency is poor, and the truss supporting structure is arranged below the internal vertical main beams of the greenhouse with the main beams of the quadrilateral truss unit structure, so that the enough strength is ensured, and the consumption of manpower and materials is increased. On the premise of ensuring the sufficient intensity and illumination of the greenhouse, time saving, labor saving and economy are important considerations, so that the method has important significance for the optimal design of the main beam structure of the dome greenhouse.

Disclosure of Invention

The invention aims to solve the technical problems of poor illumination and economy of the existing dome greenhouse and provides a gordon euryale leaf vein dome-imitated greenhouse framework structure.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme:

a gorgon fruit leaf vein dome-imitating greenhouse skeleton structure comprises ring beams, middle upright columns, main beams, greenhouse doors and skylights, wherein the ring beams are obtained by equally dividing a circle with the radius of 6000 mm into 20 equal parts, the upright columns are uniformly arranged at each equal part and four quadrant points of the circle, the main beams are arranged above the ring beams and are divided into four layers in four equal parts in the vertical direction 1/4, the whole structure is a triangular truss unit and a quadrangular truss unit, the first layer of the main beams is obtained by equally dividing auxiliary circles into 8 equal parts, intersection points are connected with the tops of the middle upright columns to form a triangular unit, the second layer of the main beams is obtained by radially extending the main beams of the first layer to the auxiliary circles of the second layer in 45 degrees, the intersection points are sequentially connected around the circumference to form alternate forms of the triangular unit and the quadrangular unit, and the third layer of the main beams radially extend the main beams to the auxiliary circles of the third layer in 45 degrees in four directions of southwest, northwest, northeast and southeast, the intersection points are obtained and connected, the fourth layer of the main beams are connected with the ring beam through the stand column, a greenhouse door is arranged between the two vertical main beams in the front view direction of the fourth layer of the upper portion of the ring beam, and the first layer of the main beams are provided with four skylight openings capable of being opened and closed.

Compared with the prior art, the invention has the beneficial effects that:

(1) the span of the greenhouse skeleton structure imitating the gordon euryale leaf vein dome is 12 m, and under the same span, the mechanized operation capability is improved, and a reliable facility environment is provided for three-dimensional farming agriculture;

(2) the first layer of the main beam is provided with four skylights which can be freely ventilated by matching with the ventilation opening at the lower side, thereby achieving the effect of energy saving and enabling the up-and-down convection ventilation of hot air to exert the best efficiency;

(3) the invention provides a dome greenhouse skeleton structure which has high strength, strong illumination, material saving and convenient mechanical operation by referring to the vein structure of the gorgon fruit veins, and analysis proves that the bifurcation structure and the bifurcation angle of the gorgon fruit veins not only can transfer the action of concentrated stress and improve the strength of the whole structure, but also can save materials on the premise of ensuring the sufficient strength of the greenhouse.

Drawings

The invention is further described with reference to the accompanying drawings in which:

FIG. 1 is a front view of an imitation gorgon euryale leaf vein dome greenhouse architecture;

FIG. 2 is a top view of an imitation gorgon fruit vein dome greenhouse framework;

FIG. 3 is a parameter diagram of an imitation gorgon euryale leaf vein dome greenhouse architecture;

FIG. 4 is a parameter diagram of an imitation gorgon fruit vein dome greenhouse girder;

reference numerals: 1. ring beam, 2, middle column, 3, main beam, 4, greenhouse door, 5, skylight.

Detailed Description

The invention is described in detail below with reference to the attached drawing figures:

as shown in the figure, the gordon euryale leaf vein dome imitating greenhouse skeleton structure comprises a ring beam 1, a middle upright post 2, a main beam 3, a greenhouse door 4 and a skylight 5, wherein the ring beam 1 is formed by equally dividing a circle with the radius of 6000 mm into 20 equal parts, the upright posts are uniformly arranged at four quadrant points of each equal part and circle, the main beam 3 is arranged above the ring beam 1, the main beam 3 has four layers totally and is obtained by performing 1/4 arc quartering in the vertical direction, the whole structure is a triangular truss unit and a quadrilateral truss unit, the auxiliary circle is equally divided into 8 equal parts on the first layer of the main beam 3, the intersection point is connected with the top of the middle upright post 2 to form a triangular unit, the first layer of the main beam 3 radially extends to the auxiliary circle of the second layer at an angle of 45 degrees to obtain intersection points which are sequentially connected around the circumference to form a triangular unit and quadrilateral unit alternate form, and the third layer of the main beam 3 is arranged in the southwest, northwest and northwest, Northeast, four directions in the southeast are 45 radial extensions to the supplementary circle of third layer with second floor girder 3, it links to each other to obtain the nodical, 3 third layer southward crossbeams of girder are by the vertical downward acquisition in 3 second floors of girder, in order to connect the greenhouse door 4 on 3 fourth floors of girder, 3 third floors of girder east, west, three direction crossbeam one end in north and southwest, northwest, northeast, four direction crossbeams in southeast link to each other, the other end is with the vertical symmetrical structure that is with it of 3 second floor crossbeams of girder, 3 fourth floors of girder pass through the stand with gird 1 and link to each other, 1 upper portion fourth floor orthographic view direction of gird is equipped with greenhouse door 4 between two vertical girders, 3 first floors of girder are equipped with four skylight 5 that can open and shut.

Due to regional differences and actual objective requirements, different greenhouse purposes in each region have different requirements on the size of a greenhouse framework, and in addition, different covering material choices are also different according to different greenhouse purposes in different regions. By using the framework method, the greenhouse framework with the same size and the same bearing capacity can be ensured to have more saved materials and stronger illumination.

Claims

1. The utility model provides an imitative gorgon fruit leaf vein dome greenhouse skeleton texture which characterized in that: the method specifically comprises the following steps:

s1, modeling of a greenhouse skeleton structure imitating vein distribution dome: extracting a typical leaf vein supporting structure by adopting a reverse engineering technology, and establishing a three-dimensional model of a dome greenhouse framework structure by utilizing AutoCAD software based on a structure bionic method, wherein the three-dimensional model comprises a ring beam, a middle upright post, a main beam, a greenhouse door and a skylight, the dome greenhouse framework structure is hemispherical and is formed by combining triangular units and quadrilateral units, the latticed shell units are in a layer-by-layer grading form from top to bottom, and the first layer of main beam is obtained by equally dividing an auxiliary circle into 8 parts;

s2, load combination analysis: searching corresponding standards and standards, comprehensively considering design requirements of enterprises, geographical environments and the like on a dome greenhouse skeleton structure, wherein the load combination adopts a combination form of constant load and wind load and constant load and snow load, and the value taking method of each load is as follows: the dead load is the sum of the dead weight of the maximum polygonal unit on the 1 st to 4 th layers and the weight of the covering material, the acting direction is the horizontal projection direction, and the calculation formula of the wind load is W_k＝W₀(μ_zμ_s-K₀) The calculation formula of the snow load is S_k＝S₀μ_rC_eI_eC_tg；

S3, mechanical analysis of a dome greenhouse skeleton structure: the intensity, rigidity and stability of the dome greenhouse skeleton structure of the triangular unit are verified, the intensity takes the effects of the internal axial force and the bending moment into consideration, and the verification formula is

The rigidity is measured by the maximum deflection, namely the maximum deflection of the bent girder, the stability adopts an out-of-plane stability calibration method, and the calibration formula is

2. The gordon euryale leaf vein dome-imitating greenhouse skeleton structure as claimed in claim 1, which is characterized in that: the step S1 is to adopt reverse engineering software Geomagic studio to restore and reduce the extracted vein three-dimensional model, the radius and height of the bottom layer of the dome greenhouse skeleton structure in the step S1 are 6 meters, and 2 meters are adopted from the upper layer to the lower layer^xThe index type is graded layer by layer, 4 grades are totally, and the branch angle of each grade is 45 degrees.

3. The gordon euryale leaf vein dome-imitating greenhouse skeleton structure as claimed in claim 1, which is characterized in that: and S3, taking the value of the constant load according to the sum of the horizontal projection weights of the longest beams of the 1 st layer to the 4 th layer of the dome greenhouse skeleton structure.